Improvement in bran-scouring machines



s. c.MMA sTER. BRAN scoURING-,MACHINL N0.18Z,841. Patented Oct. 3,1876.

l l l I UNITEDISTATES PATENT .OFFICE- SAMUEL o. McMAsrEaoFlsEwIoKLY,PENNsYLvnnLnl l IMPROVEMENT IN BRANS`COURING1 MACHINESaSpecication forming part of Letters Patent No.V .182,841, dated October3, 1876; application filed,

. I July 12, 1876.

To all whom it may concern:

Be it known that I, SAMUEL C. MoMAsrER, of Sewickly borough, county ofAllegheny, State of Pennsylvania, have invented ordiscovered a new anduseful Improvement in Bran Duster and Scourer;4 and l do hereby declarethe following to be a full, clear, concise, and exact descriptionthereof, reference being had to the accompanying drawing, making a partof this specification, in Which-like letters indicating like parts-Figure l isaside view, in perspective, of my improved machine, with theside doors of the case open, the better to show its internal structure.Fig. 2 is a vertical sectional view thereof; and Figs. 3, 4, and 5 areviews of detached parts,presently to be explained.

In milling operations, it is well known that portions of the nutritiveand useful properties of the grain adhere to the bran with greattenacity. My improved machine is designed to effect the removal from thebran of such adhering properties, and the permanent separation of thesame from the bran.

The frame A is of any suitable construction. lt supports a case composedof a cylindrical part, B, and end disks B1. This case may be made toopen on one side, by means of doors B2, for convenience of access to theinside for cleaning or repairs. The driving-spindle D passes verticallythrough the axial line of the case, and turns in suitable bearings inthe disk B1. Power is communicated to the spindle by a band-wheel, D',or in other suitable way. A hopper or chute, b, for feeding the bran in,passes through the upper-end disk vnear its center. Just beneath thisupper-end disk, and attached to the spindle D, is an vopen skeleton orspider frame, a, more fully represented in Fig. 3, on the under side ofwhich is radially arranged a series of brushes, a', in any desirednumber, which play on or in convenient proximity to the fixed ornon-rotating combined scouring and sifting bed c c1, more fullyrepresentedin Fig. 4. This bed is composed of radial sections of emeryor sandstone blocks c, alternating with wire cloth sections c1,supported in any suitable frame, c2. The bran when fed in at the chute bdrops onto ,the bed c c1, where it is acted on by the revolving brushesa', so that in passing over the emery sections c it shall. be scoured,and the ner qualit-ies of the ground` product loosened ordetachedtherefrom, and, also, so `that in passing over thewire sectionsc1A such ner products shall `be siftedgthrough such wire sections, ,andso .separated A from `the bran.

These wire sections should be of the proper flneness of wire and mesh,such being well known in the art in other modes of use for kindredpurposes. y

The bran, by the centrifugal action of the brushes, is, after beingscoured, dropped over the outer periphery of the bed c c1, outside ofwhich it passes down the annular space c3, and is received and gatheredto the center again by a hopper, b. The liner particles of the grain,after passing through the wire sections 01, are caught by a flatcircular table, e, fixed in position, and over which a scraper, d,revolving with the shaft D, operates to discharge such fine flour, orother properties, laterally out'of the machine by one or more chutes, f.The form of the scraper d is more fully shown in Fig. 5. The brandescending in the hopper b is discharged onto a second scouring andsifting bed, s s', similar in all material respects to that representedin Fig. 4, and already described. Here it is again subjected to thescouring and sifting operations above set forth by means of brushes i',attached to a frame, t, similar to that shown in Fig. 3, and alreadydescribed. The finer parts so scoured off and sifted through aregathered on the lower disk B1, and by a scraper, d', are discharged atthe chute f1. The bran is thrown off circumferentially, and is eitherdropped down an annular passage, as before, into another hopper, similarto that shown at b, with a repetition, by a further duplication of thescouring and sifting devices of the operation described; or', if thebran is sufciently scoured, it is forced out by the chute f2.

In order to vary the adjustment of the brushes with reference to thebeds below,I arrange the lower end of the shaft D in a movable step, z,and, by trunnions z on its opposite sidesfrest this step in a lever, m,and guide it vertically by causing its projecting lower end to move in asocket, g, both being accurately centered. One end of the lever m ispivoted tothe frameof the machine, and

the other end is attached to a stem, h, which,

passing through a lug, g, is adjusted up and down at pleasure by ascrew-nut, h.

Such changes in the apparatus described as do not materially change themode of. operation set forth may be made, as, for example,A

ters slightly raised above or depressed below y the peripheries; and indescribing them as horizontal I do not limit myself to a positionmathematically horizontal, but use that term to distinguish them fromscouring and sifting surfaces arranged' vertically in the side Walls ofthe case. It will be observed that the Wirecloth and emery sectionsextend each from the spindle radially outward, so that at lall points,from the receiving-point to the periphery, the bran is subjected to botha scouring and sifting operation.

I` claim herein as my invention- In a bran dusting and scouring machine,a horizontal scouring and sifting bed, composed of alternate segments ofwire-cloth and emery, or its described equivalent, extending radiallyfrom the spindle outward, in `combination with a horizontal brushWorking thereon, substantially as set forth. A

In testimony whereof I have hereunto set my hand. l

' SAMUEL c. MGMASTER.

Witnesses:

GEO. F. RUDIsILL, GEORGE H. CHRISTY.

